Spur-shore crew.



No. 703,830. Patented luly I902.

w. s. RENDLE.

SPUR SHORE SCREW.

A lication filed Dec. 26, 1901.

(No Model.)

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. His litter J UNTTED STAT-ES PATENT OFFICE.

\VILLIAM S. RENDLE, OF EAST BOSTON, MASSACHUSETTS.

SPUR-SHORE SCREW.

SPECIFICATION forming part of Letters Patent No. 703,830, dated July 1,1902. Application filed December 26,1901. Serial No. 87,167. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM S. RENDLE, a citizen of the United States,residing at East Boston,.in the county of Suffolk, State ofMassachusetts, have invented certain new and useful Improvements inSpur-Shore Screws,- of which the following is a full, clearj'and eX- actdescription. 1

In the erection of certain forms of bridges and wharves it is customaryto drive lopg piles into the mud and clay beneath the warer and tostrengthen the same against the ebb and flow of the tides and the shocksof ice and vessels by bolting the upper ends of selected piles together.To do this, it is necessary to force the upper ends of a selected pairof piles'strongly together and to hold them together until properlyunited by bolts. One of these piles is usually made shorter than itscompanion, and being designed to brace the latter is termed the shore-or spur-shore. Prior'to my invention it has been customary to thusforce the upper end of the brace or spur-shore over against the pile bymeans of a pressure-screw laboriously turned by hand and requiring theexpenditure of much exertion and'considerable time.

The object of my invention is the construction of means wherebycompressed air canbe utilized for the purpose of forcing the pilestogether, and thereby enable a single manin a very few minutes toaccomplish what previously required two men working for a considerablelength of time. 7

Referring to the drawings forming part of this specification, Figure 1is a plan View of my apparatus, showing the same in the opera-' tion ofbringing two piles together. Fig. 2 is a sectional detail view of therevoluble nut forming a part of the apparatus.

The referencenumerals 1 and 2 indicate the two piles whose upper ends itis desired to force together and hold until bolted. My'im-' provedmechanism for thus operating upon the piles comprises aframework 3 'Z 8,a'chain 4, and a power-screw 10, actuated by means- Said'chain,

of the compressed-air motor 25. is attached at one end to one of theside bars 3 and is designed to be passed about one of the piles andsecured to the other side bar by asuitable hook 5. The power-screw 10passes through the rotatable nut 16, turning in suit able bearings inthe parallel bars or framesections 7 8 and is supported at its oppositeend by means of the cross-bar12,'having eyes 13, slidable on the sidebars. This cross-bar both supports the operative extremity of the powerscrew and prevents it from turning with the internally-threaded sleeveor nut 16. Said nut is prevented from end play by means of its shoulders17, as shown in Fig. 2, and is revolved by the spur-gear 15, formed orfixed thereon, and the pinion 20, meshing therewith. To turn saidpinion,it is provided with the projecting shaft 21, upon the outer endof which the shaftof the compressed-air motor 25 is designed to besecured. The chain t having been passed about one of the piles, as 2,and the pointed head 11 of the power-screw engaged in the opposite sideof the other pile 1, the valve of the motor is adjusted and compressedair admitted to the latter through the pipe 26. Arapid rotation isimmediately given to the pinion and a reduced speed, but increasedpower, imparted to the gear 15. This motion of the said gear and nutrigid therewith by turning said nut upon the powerscrew forces thelatter strongly against the pile 1, and. thereby brings the two, themain pile and the spur-shore pile, quickly toward each other until theymeet and are bolted together.

AlthoughI have described the motor as being actuated by compressed air,an electric motor may be substituted therefor or other motive powerwhich can be connected with its source of power by a flexible coupling.

two closely parallel bars uniting the same,

the internally-threaded sleeve or nut rotatable in said parallel bars,the spur-gear rigid with said nut, the pinion meshing with said gear, amotor forturning said pinion, a powerscrew fitted in said nut, thecross-bar rigid.

with said screw and sliding on said side bars, and a flexible meansattached to the ends of said side bars for securing said frame to one oftwo piles while the power-screw engages the other pile, substantially asdescribed.

2. In a spur-shore screw, the combination of the framework comprisingthe side bars able along said side bars and rigid with said screw, and achain attached to the ends of said side bars to pass about the second oftwo piles designed to be pressed together, substantially as described.

In testimony that I claim the foregoing invention I have hereunto set myhand this 23d day of December, 1901.

WILLIAM S. RENDLE.

Witnesses:

A. B. UPHAM, M. U. UPHAM.

